The pool at the Amara Signature Hotel on Changshou Lu in Jign'an: It's got a central location and it's open to the public, which means it's going to be crowded on the weekends. That's going to be the theme throughout this roundup. Central pools are best visited during the week if you're lucky enough to have a working schedule that allows for a sneaky pool day on a Tuesday or something. This is good for that. And there's a small kid's pool as well. Seasonal passes are also available.